
CIVIL SNAPS – GEOTECHNICAL ENGINEERING
Activity of Soil
- It is a measure of water holding capacity of clayey soils
- The change in the volume of a clayey soil during swelling or shrinkage depends upon the activity.
- Mathematically it is the ratio of the plasticity index and the percentage of clay fraction

Where F = percentage finer than 2µ size
Acitivity |
Soil Type |
|
A < 0.75 |
Inactive |
| 0.75 < A < 1.25 |
Normal |
| A > 1.25 |
Active |
CIVIL SNAPS – GEOTECHNICAL ENGINEERING
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CIVIL SNAPS – GEOTECHNICAL ENGINEERING



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